Vaporizing type oil burner



May 15, 1951 H. F. DANIELS 2,553,304

VAPORIZING TYPE OIL BURNER Filed April 26, 1948 J o ,//\/Z/E/\/ 727RHERBERT F. DAN|EL$ 4 TTU NEW Patented May 15, 1951 UNITED STATES PATENTOFFICE VAPORIZING TYPE OIL BURNER Herbert F. Daniels, Portland, Oreg.

Application April 26, 1948, Serial No. 23,170

2 Claims.

This invention relates generally to heat generating devices andparticularly to an oil burner.

The main object of this invention is to produce a burner especiallyadapted for small installations and which can be easily constructed at aminimum cost for time and material by the use of castings;

The second object is to so construct the burner that the parts subjectedto the most heat will receive the greatest cooling action.

A further object is to so construct the burner that expansion stresseswill not be injurious to the burner.

The principle of operation is similar to the burner described in myUnited States application, Serial Number 769,452, filed August 19, 1947,over which the device described herein is an improvement.

I accomplish these and other objects in the manner set forth in thefollowing specification, as illustrated in the accompanying drawing, inwhich:

Fig. l is a perspective view of the complete burner with parts brokenaway in section to disclose the construction.

Fig. 2 is a vertical section taken along the line 22 in Fig. 3.

Fig. 3 is a vertical section taken along the broken line 3-3 in Fig. 2.

Fig. 4 is a horizontal section taken along the line 4-4 in Fig. 3.

Fig. 5 is a perspective view of the adjusting frame.

Like numbers of reference refer to the same or similar parts throughoutthe several views.

Referring in detail to the drawing, there is shown an elongatedhorizontal air box consisting of the top It], the bottom I I, the sides[2 and the connecting ends [3 and It. This air box unit is cast from anydesirable material and has formed in the rear end of the bottom H an airinlet opening l5 which is connected by the air duct IE to the fan casingl'l within which is a fan (not shown) which is operated by a motor It.

In the forward end of the bottom I I are formed the air outlet orificesl9- and 20. The orifices 20 are pointed downwardly and outwardly.

Under the forward end of the bottom II is the vaporizing compartment 2|whose side walls 22 extend upwardly along the sides I2 and separatedtherefrom by a packing 23 and secured thereto by means of the screws 24.

Connecting the side walls 22 is a rear wall 25 which extends from theunderside of the bottom ,II to the bottom 23 of the vaporizing compart-2 ment 2|. The forward end 21 of the bottom 26 slopes upwardly to theedge 28 of the burner orifice 29.

The front 30 is vertical and extends downwardly from the end l3 to thebackwardly turned bottom 3| of the duct 32 whose side 33 is joined tothe bottom 26.

The edge 28 is provided with air outlet orifices 34 which point upwardlyand outwardly. Curved walls 35 are provided at each corner 36 and formducts 3'! which connect the air box 38 with the duct 32 through theopening 39 formed in the bottom I I.

Oil is admitted to the compartment 2| through an oil feed pipe 40 underthe control of the float valve 4| which is automatically closed when theoil level exceeds a safe level. Such devices are in common use andrequire no explanation here.

In Fig. 5 is shown the frame 42 consisting of a rectangular memberhaving the vertical sides 43 and the horizontal top 44 and bottom 45.The vertical sides 43 have their faces 46 angled with relation to theouter sides 41 while the front 48 is normal to the sides 41.

The top 44 has a horizontal upper face 49 which is normal to the frontface 50. The rear face 5| is inclined with relation to the faces 49 and50.

The bottom of the frame 42 is somewhat wider than is the rest of theframe and has its underside 52 resting on the bottom 26 While its rearand front faces 53 and 54 are oppositely inclined, leaving a narrow rim55 along its top edges which is somewhat shorter than the edge 50. Theends 51 of the bottom 45 are inclined as are the faces 53 and 54.

The frame 42 is free to move along the bottom 26, thereby determiningthe vaporizing area.

It will be seen from the foregoing that this arrangement makes possiblethe construction of a burner of a type by means of a casting process.

It will also be noted that air from the air box is pre-warmed before itescapes through the holes I9 and 20 and that the air which passesdownwardly through the holes 39 and through the ducts 31 supplies thesecondary air outlets 34 and 34A with super-heated air, and due to thefact that the duct 32 is fed from both ends, the air delivery is uniformalong the length of the edge 28.

The purpose of the construction in Fig. 5 is to insure stability to apart which cannot well be otherwise secured and at the same time toprovide the greatest amount of evaporating surface for the oil as itpasses over the edge 55. Although enough clearance is provided to permitthe frame 42 to be moved for adjustment, there is no objectionableby-passing of oil around the ends 41 as the clearance is soon taken upwith residue and any oil which does find its way around the ends isvaporized and the gas itself acts as a barrier to the oil.

The purpose in making the frame 42 movable is to change the relativesizes of the vaporizing area between the frame 42 and the rear wall 25,and the mixing and combustion space between the frame 42 and the front30.

I claim:

1. In a burner of the class described, the combination of a vaporizingchamber havingia burner orifice at the upper portion of one end ofsthechamber, the bottom of said chamber being sub stantially horizontal atthe end "opposite-said orifice, the remainder of said bottom sloping11pwardly to the lower sideof said orificeyan air manifold around saidorifice having outlet holes discharging converging air-streams into theflame coming frornsaid orifice, adjustable means for controlling theeffective area of the evaporating surface, means for supplying oil tosaid chamber and means for supplying primary air to the interior of-'the chamber and secondary air to said converging air streams.

21111 a burner of the class described, a combustion chamber consistingof a channel shaped box'having a horizontal bottom extending from themiddle of its length to one end-thereof and having arear'wall at saidand extending to the top of the side walls of the channel, the re--mainder of said bottom sloping upwardly to a 4. plane below the top ofsaid rear wall, the front end of said chamber having an opening thereinconstituting a burner orifice, the front corners having air manifoldsdisposed therein extending downwardly from the top of said rear wall tothe under side of said sloping bottom and along the under side thereof,along the width of the orifice, a movable frame mounted on thehorizontal portion of said bottom for controlling the effective area ofthe evaporation surface, an air box extending over the top of saidburner beyond its rear end, communicating with said manifold, and havingair outlet openings in that portion of the air box directly above thesloping portion of said bottom}:

HERBERT F. DANIELS.

REFERENCES CITED Theqfollowing references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 2,083,832 Daniels June 15, 19372,165,212 Bauer July 11, 1939 2,214,664 Donley- Sept. 10, 1940 2,259,743Fletcher Oct. 21, 1941 2,369,833 Livar Feb. '20, 1945 2,392,757 MillerJan. 8, 1946 2,393,176 Livar et'al Jan. 15, 1946 2,396,818 Breese Mar;19, 1946 FOREIGN PATENTS Number Country Date 39,495 Netherlands Oct.16,- 1936

